发明名称 PROCESS E APARELHO PARA PERFILAGEM DE LIGACAO DE CIMENTO
摘要 <p>In accordance with principles of the present invention methods and apparatus are provided for evaluating the quality of the cement bond in cased boreholes. Acoustic energy is used to excite the borehole-casing-annulus-formation system and the quality of the cement bond is determined by examining the ratios of the signals received by two longitudinally spaced apart receivers supported on a sonde. The acoustic energy is generated by two transmitters symmetrically disposed above and below the receivers along the sonde. The spacings between the receivers themselves and between the receivers and the transmitters are selected so as to enhance the correlation between the ratios of the received signals and the quality of the cement bond log. An additional receiver, supported on the sonde at a small distance from one of the transmitters, is employed to determine the quality of the cement bond in hard formations.</p>
申请公布号 BR8303551(A) 申请公布日期 1984.02.14
申请号 BR19838303551 申请日期 1983.07.01
申请人 PRAD RESEARCH AND DEVLOPMENT N.V. 发明人 JEAN-PIERRE H.R.M. MASSON;LEE H. GOLLWITZER
分类号 E21B47/00;G01V1/44;(IPC1-7):G01V1/18 主分类号 E21B47/00
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